The changes in the posterior segment of the eye observed in 123 diabetic patients with proliferative retinopathy are described. In this series, background retinopathy was a frequent occurrence, but it was less pronounced in eyes with severe proliferative retinopathy. All degrees of proliferative retinopathy were encountered; proliferations consisting of naked vessels were observed in 78 eyes, while connective tissue formations were also present in 109 eyes. Posterior vitreous detachment was seen in 105 eyes, and retinal detachment in 52
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